- What is a SAS library?
- How do you order variables in SAS?
- How do you delete a dataset in SAS?
- How do you rename a variable in SAS Data step?
- How do you filter variables in SAS?
- How does retain work in SAS?
- How do I keep only certain variables in SAS?
- How do you remove missing values in SAS?
- How do you input data into SAS?
- What is a SAS data step?
- How do you delete specific rows in SAS?
- What is the purpose of using an IF condition then delete statement in a data step?
- What is Proc Freq?
- What does set mean in SAS?
- What does Proc univariate do in SAS?
- What is Substr in SAS?
- How do you use Proc contents?
- How do you delete a variable in SAS?
- How do you drop multiple variables in SAS?
- How do I drop observations in SAS?
What is a SAS library?
In short, a SAS library is simply a collection of SAS files that are stored in the same folder or directory on your computer.
Other files can be stored in the same folder or directory, but only the files that have SAS file extensions are recognized as part of the SAS library..
How do you order variables in SAS?
If you list just one variable, then SAS will sort the observations in the dataset based on ascending values of that variable. … You can sort in descending order by placing the keyword DESCENDING before the variable name that you want the dataset to be sorted on. … You can sort by as many variables as are in the dataset.
How do you delete a dataset in SAS?
DELETING DATA SETS/CATALOGS proc datasets nolist; copy in=db out=work; quit; run; proc datasets lib=work nolist; delete adverse summary; quit; run; This only deletes the specified files on the DELETE command. In order to delete all members within a library, use the KILL option on the DATASETS statement.
How do you rename a variable in SAS Data step?
There may be occasions in which you want to change some of the variable names in your SAS data set. To do so, you’ll want to use the RENAME= option. As its name suggests, the RENAME= option allows you to change the variable names within a SAS data set.
How do you filter variables in SAS?
To create a filter by using the Filter and Sort window:After you have selected the variables that you want to include in the output table, click the Filter tab.Select a variable from the first drop-down list. … Select an operator from the second drop-down list.Enter a value in the third box or click.More items…•
How does retain work in SAS?
The RETAIN statement simply copies retaining values by telling the SAS not to reset the variables to missing at the beginning of each iteration of the DATA step. If you would not use retain statement then SAS would return missing at the beginning of each iteration. The retain statement keeps the value once assigned.
How do I keep only certain variables in SAS?
The KEEP= option tells SAS which variables you want to keep in a data set. If you place the KEEP= option on the SET statement, SAS keeps the specified variables when it reads the input data set.
How do you remove missing values in SAS?
To remove records that have a missing value for a particular character variable, you simply need to use an IF statement to check for blanks, followed by a THEN DELETE statement. In this example, we are going to remove all records with a missing value for the DeathCause variable.
How do you input data into SAS?
dat into SAS, use the following syntax: DATA cars4; INFILE “c:carsdatacars4. dat”; INPUT make $ model $ mpg weight price; RUN; TITLE “cars4 data”; PROC PRINT DATA=cars4(OBS=5); RUN; Here is the output produced by the proc print statement above.
What is a SAS data step?
The DATA step consists of a group of SAS statements that begins with a DATA statement. The DATA statement begins the process of building a SAS data set and names the data set. The statements that make up the DATA step are compiled, and the syntax is checked. If the syntax is correct, then the statements are executed.
How do you delete specific rows in SAS?
To delete some or all of the rows in a table, use the DELETE statement. When the statement is successfully executed, the SAS log shows a message that indicates the number of rows that have been deleted.
What is the purpose of using an IF condition then delete statement in a data step?
IF-THEN-DELETE Statement Use the DELETE statement when it is easier to specify a condition that excludes observations from the data set or when there is no need to continue processing the DATA step statements for the current observation.
What is Proc Freq?
Proc FREQ is a procedure that is used to give descriptive statistics about a particular data set. Proc FREQ is used to create frequency and cross-tabulation tables. It enables analysis at various levels. Associations between variables and responses can be tested and computed.
What does set mean in SAS?
SET reads an observation from an existing SAS data set. INPUT reads raw data from an external file or from in-stream data lines in order to create SAS variables and observations. Using the KEY= option with SET enables you to access observations nonsequentially in a SAS data set according to a value.
What does Proc univariate do in SAS?
PROC UNIVARIATE is a procedure within BASE SAS® used primarily for examining the distribution of data, including an assessment of normality and discovery of outliers.
What is Substr in SAS?
INTRODUCTION. The SAS data step function SUBSTR (commonly pronounced “sub- string”) function is used to work with a specific position or positions of characters within a defined character variable. The function focuses on a portion of a string and can go on either side of the “=” sign in a data step statement.
How do you use Proc contents?
The basic syntax of PROC CONTENTS is: PROC CONTENTS DATA=sample; RUN; As with all SAS procedures, the DATA command (which specifies the name of the dataset) is optional, but recommended. If you do not specify a dataset, SAS will use the most recently created dataset by default.
How do you delete a variable in SAS?
To delete variables in SAS, you can use the DROP statement in a DATA step. Suppose you want to delete variables x1 , x2 , and x3 in SAS data set old1 and save it to a new SAS data set new1 .
How do you drop multiple variables in SAS?
In DATA steps, when you create multiple output data sets, use the DROP= data set option to write different variables to different data sets. The DROP statement applies to all output data sets. In PROC steps, you can use only the DROP= data set option, not the DROP statement.
How do I drop observations in SAS?
To remove observations in SAS, you can use the IF statement in a DATA step. Suppose you want to exclude all observations whose scores are greater than 100.